Spool



FIG. 1 is a perspective view of the spool of my design;

FIG. 2 is a top plan view thereof, with the bottom plan view being the same;

FIG. 3 is a front elevational view thereof, with the rear elevational view being the same;

FIG. 4 is an enlarged elevational view of a circled portion of the spool of FIG. 3; and,

FIG. 5 is a left side elevational view thereof, with the right side elevational view being the same. 

CLAIM The ornamental design for a spool, as shown and described. 